New Methods for Bonding FRP Strips Onto Masonry Structures: Experimental Results and Analytical Evaluations

Foraboschi, Paolo; Vanin, Alessia

doi:10.1615/compmechcomputapplintj.v4.i1.10

Cited by 22 publications

(20 citation statements)

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“…The most effective technique to convert (unreinforced) masonry into reinforced masonry is to epoxy bond Fiber-Reinforced Polymer (FRP) strips onto the external surface of the masonry (Ascione et al, 2005;D'Ambrisi et al, 2013a and b;Foraboschi and Vanin, 2013b;Muciaccia andBiolzi, 2012 andFedele et al, 2014).…”

Section: Earthquake Performance Upgrading By External Prestressingmentioning

confidence: 99%

Earthquake Protection of Colonial Bell Towers in Colima, Mexico with Externally Prestressed FRPs

Preciado

Budelmann

Bartoli

2015

International Journal of Architectural Heritage

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Occidente se pone a disposición general bajo los términos y condiciones de la siguiente licencia: http://quijote.biblio.iteso.mx/licencias/CC-BY-NC-ND-2.5-MX.pdf (El documento empieza en la siguiente página)Mexico, characterized for being a high seismic area (M7.5). The 3D FE models are calibrated with experimental data and assessed through nonlinear static approaches including the seismic demand and an accurate validated masonry model. Based on an extensive parametric study on different configurations of old masonry towers, it is selected an optimal prestressing force and device. The Colonial towers are retrofitted with four prestressing devices of FRPs to convert them into a high energy-dissipative reinforced masonry. The external vertical prestressing is included at key points identified in the seismic vulnerability assessment. This technique is in compliance with the demand for architectural conservation and may be located without drilling and unbounded in order to be fully removable. The seismic performance is enhanced by increasing force, displacement and internal confinement. It is observed an upgrading of 35% and 20% of displacement capacity. With these results it is corroborated that external vertical prestressing allows a substantial increment of ductility for seismic energy dissipation purposes.

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Section: Earthquake Performance Upgrading By External Prestressingmentioning

confidence: 99%

Earthquake Protection of Colonial Bell Towers in Colima, Mexico with Externally Prestressed FRPs

Preciado

Budelmann

Bartoli

2015

International Journal of Architectural Heritage

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“…Also, premature debonding of FRP, a brittle but unavoidable failure mode, was commonly observed during the test and, in general, FRP could not reach its ultimate strength (Ehsani et al 1997;Stratford et al 2004;ElGawady et al 2005;Foraboschi and Vanin 2013).…”

Section: Introductionmentioning

confidence: 99%

In-Plane Shear Performance of Masonry Walls after Strengthening by Two Different FRPs

Rahman

Ueda

2016

J. Compos. Constr.

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The present experimental study was aimed to investigate the in-plane shear performance of externally strengthened masonry walls using two types of fiber reinforced polymer (FRP) sheets− CFRP (Carbon fiber reinforced polymer) and PET-FRP (Polyethylene Terephthalate) sheets. Among these two, PET-FRP has a low tensile strength but possess a higher fracturing strain than CFRP. Twelve masonry walls made from clay brick were tested for static lateral loading under constant compression, after bonding CFRP and PET-FRP sheets onto their surfaces in three different configurations. The ultimate shear strength and deformation at peak load were the two important observations. The mechanisms by which load was carried were observed, varying from the initial uncracked state, to the final, fully cracked state. The results demonstrate that a significant increase in the in-plane shear capacity of masonry can be achieved by bonding these two FRPs to the surface of the walls but ductility is compromised when CFRP is used. Walls retrofitting with PET-FRP in a cross-diagonal fashion show a good ductile behavior in both pre-peak and post-peak regimes. The experimental data were used to assess the effectiveness of the strengthening of one FRP over the other. PET-FRP in diagonal configuration was found to be the most effective way of strengthening without compromising the two most essential aspects of masonry i.e strength and ductility.

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“…those of proposed by Foraboschi and Vanin [11]) However, when heritage structures are analysed to improve the structural response, it is no usual to analyse the intrinsic retrofitting potential of traditional materials. Besides, it is no common to analyse the influence of those materials in the damage evolution from the hypothetical original state.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

“…Although the structure could sustain after-shock of moderate intensity, additional repair measures are required (e.g. FRP strips [11]), in order to reduce drifts at the core and to increase residual lateral strength and stiffness. From the LS DL assessment it is concluded that, in spite of the upgraded response due to the repair materials, it is advisable to reduce drifts.…”

Section: Transient Analysesmentioning

confidence: 99%

Collapse and upgrading mechanisms associated to the structural materials of a deteriorated masonry tower. Nonlinear assessment under different damage and loading levels

Pineda

2016

Engineering Failure Analysis

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New Methods for Bonding FRP Strips Onto Masonry Structures: Experimental Results and Analytical Evaluations

Cited by 22 publications

References 0 publications

Earthquake Protection of Colonial Bell Towers in Colima, Mexico with Externally Prestressed FRPs

Earthquake Protection of Colonial Bell Towers in Colima, Mexico with Externally Prestressed FRPs

In-Plane Shear Performance of Masonry Walls after Strengthening by Two Different FRPs

Collapse and upgrading mechanisms associated to the structural materials of a deteriorated masonry tower. Nonlinear assessment under different damage and loading levels

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